Chakra control isn't transferred when transferring just chakra though. Naruto did to Boruto what Tsunade and Sakura did to Ohnoki and Obito respectively which is transfer chakra to amp their own jutsu.Boruto made a Rasengan with a added chakra control that's expected and common.
As it grew, Naruto's chakra control became the dominant effect as Boruto was surprised how Naruto could make it that big.
Ironically, it would seem you guys have been raving about Boruto creating a normal size Rasengan, since his influence on it became non-existent when Naruto made it bigger.
I haven't been raving about anything though.. I don't even really understand that part from the OP hence my "needed for that technique" in the last post. I just wanted to let you know the scenario you used to try to compare the Lee and Boruto cases would be incorrect.